CN107340105A - A kind of automatic air tightness detection system of multistation - Google Patents
A kind of automatic air tightness detection system of multistation Download PDFInfo
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- CN107340105A CN107340105A CN201710606598.2A CN201710606598A CN107340105A CN 107340105 A CN107340105 A CN 107340105A CN 201710606598 A CN201710606598 A CN 201710606598A CN 107340105 A CN107340105 A CN 107340105A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
- G01M3/3236—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers
- G01M3/3272—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers for verifying the internal pressure of closed containers
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a kind of automatic air tightness detection system of multistation, can carry out air-leakage test to multiple measurement equipments to be checked simultaneously, detection efficiency is high.Including：Airtight construction, gas circuit unit and control unit；Two or more station, the corresponding measurement equipment to be checked of each station are provided with the detecting system.Airtight construction corresponds with measurement equipment to be checked, coordinates gastight joint as driving link come instead of manually being sealed to cylinder to be detected using cylinder.Gas circuit unit includes：Source of the gas pipeline, cylinder control piper and pressurising pipeline；Each corresponding cylinder control piper of station and a pressurising pipeline；Source of the gas is divided into two-way after source of the gas pipeline：The motion of corresponding cylinder piston rod is controlled by cylinder control piper all the way；Gas is filled with corresponding measurement equipment to be checked by another way by pressurising pipeline；Control unit includes being arranged on cylinder control piper and the magnetic valve on pressurising pipeline, the pressure gauge and controller for monitoring measurement equipment the blowing pressure to be checked.
Description
Technical field
Invention is related to a kind of detecting system, and in particular to a kind of air tightness detection system.
Background technology
At present when carrying out airtight detection to the cylinder of certain model, what is used will need to wrap more for manual monitor station, during detection
Fitted tube body is lain in work case, installs seal nipple manually；It is poor that difficult and sealing is assembled during installation, causes detection efficiency
It is low, and sebific duct of supplying gas stretches fragile repeatedly, air seal test needs repeated multiple times to succeed.Thus air seal test process is caused to consume
When it is longer, cost of labor is high, it has also become the bottleneck process of assembling line.To be cost-effective, raising production efficiency, one is designed
Automatic air tightness tester and its necessity easily to operate.
The content of the invention
In view of this, the present invention provides a kind of automatic air tightness detection system of multistation, can be simultaneously to multiple to be detected
Equipment carries out air-leakage test, automatic pressurising, pressurize and detection is realized, so as to effectively improve detection efficiency.
The automatic air tightness detection system of described multistation includes：Airtight construction, gas circuit unit and control unit；The detection
Two or more station, the corresponding measurement equipment to be checked of each station are provided with system；
The airtight construction corresponds with measurement equipment to be checked, including：Cylinder and installed in the cylinder piston boom end
Gastight joint, during the cylinder operation, the air inlet of the gastight joint and measurement equipment to be checked is made by the motion of its piston rod
Hole sealing docking；
The gas circuit unit includes：Source of the gas pipeline, cylinder control piper and pressurising pipeline；Each corresponding cylinder of station
Control piper and a pressurising pipeline；Source of the gas is divided into two-way after the source of the gas pipeline：Pass through the cylinder control piper all the way
Control the motion of corresponding cylinder piston rod；Gas is filled with corresponding to be checked by another way by the pressurising pipeline
Measurement equipment；
Described control unit includes being arranged on the cylinder control piper and magnetic valve on pressurising pipeline, treated for monitoring
The pressure gauge and controller of detection device the blowing pressure；
The magnetic valve and pressure gauge are controlled by the controller：When the magnetic valve on the cylinder control piper
After being powered under the control of the controller, the cylinder piston rod motion makes the gastight joint and the air inlet of measurement equipment to be checked
Hole sealing docking；After the magnetic valve on the source of the gas pipeline is powered under the control of the controller, pass through the gas
Inflated in source capsule road direction measurement equipment to be checked；In gas replenishment process, the pressure gauge monitors the pressure value in measurement equipment to be checked in real time, when
When pressure value reaches the pressurize value of setting, stop inflation, into packing state；It is described after the dwell time setting time is reached
Controller judges the air-tightness of measurement equipment to be checked according to the pressure value of pressure gauge.
Two stations are provided with the detecting system, described control unit includes three be arranged on cylinder control piper
Five-way electromagnetic valve, two three-way electromagnetic valves being arranged on two pressurising pipelines；Source of the gas is divided into two-way after the source of the gas pipeline：
It is connected all the way with the 3 position-5 way magnetic valve, for controlling the motion of two cylinder piston rods, is specially：It is described
Source of the gas pipeline is connected with the air inlet of the 3 position-5 way magnetic valve, two gas outlets of the 3 position-5 way magnetic valve respectively with
The rodless cavity insertion of two cylinders, two exhaust outlets penetrate with the rod chamber of two cylinders respectively；
Another way is connected with gas circuit threeway A air inlet, for carrying out pressurising to cylinder to be detected, is specially：Gas circuit three
Logical A has an air inlet, two gas outlets；The source of the gas pipeline is connected with the air inlet of the gas circuit threeway A, gas circuit threeway
A gas outlet penetrates by the air inlet of the pressurising pipeline and gas circuit threeway B that are provided with two three-way electromagnetic valves, and the two of gas circuit threeway B
In individual gas outlet one by pipeline with and measurement equipment to be checked air admission hole sealing dock gastight joint insertion, another with
It is connected in the pressure gauge of measurement the blowing pressure.
Flow control valve is provided with the source of the gas pipeline, the fortune of cylinder piston rod is controlled by the flow control valve
Dynamic speed.Beneficial effect：
(1) system can realize automatic pressurising, pressurize and the detection of multiple measurement equipments to be checked simultaneously, so as to effectively improve
Detection efficiency.And multiple stations can be controlled individually, to reduce interference, the flexibility that device uses is improved.
(2) gastight joint is coordinated instead of manually being sealed to cylinder to be detected, can have as driving link using cylinder
Effect replaces manual airtight monitor station, reduces worker's tired operation, and repairs economical, conveniently.
Brief description of the drawings
Fig. 1 is the principle schematic of the detecting system；
Fig. 2 and Fig. 3 is air tightness detection apparatus structural representation corresponding with the detecting system.
Wherein：1- frames 1,2- cylinders, 7- panels, 8- main boards, 9- upper brackets, 10- undersettings, 11- cylinder blocks, 12-
Gastight joint, 13- cylinder tracheae A, 14- cylinder tracheae B, 15- travel switch, 16- workpiece gas tube, 17- pressure gauges, 18- are green
Color indicator lamp, 19- red leds
Embodiment
The present invention will now be described in detail with reference to the accompanying drawings and examples.
Embodiment 1：
The present embodiment provides a kind of automatic air tightness detection system of multistation, can realize multiple measurement equipments to be checked simultaneously
Automatic pressurising, pressurize and detection, so as to effectively improve detection efficiency.
The principle of the detecting system as shown in figure 1, the detecting system in the present embodiment is double air tightness detection system,
Two stations (being respectively No. 1 station and No. 2 stations) are provided with, two measurement equipments to be checked (can be treated in the present embodiment respectively
Detection device is cylinder) carry out air-leakage test.Including：Airtight construction, gas circuit unit and control unit.Wherein airtight construction bag
No. 1 station cylinder and No. 2 station cylinders are included, a gastight joint is connected with the piston rod of each cylinder, cylinder is as actively
Part coordinates gastight joint to replace manually sealing cylinder to be detected.
Gas circuit unit includes：Source of the gas pipeline, cylinder control piper and pressurising pipeline；Source of the gas is divided into two after source of the gas pipeline
Road：Control the motion of corresponding cylinder piston rod by two cylinder control pipers respectively all the way；Another way passes through respectively
Gas is filled with corresponding measurement equipment to be checked by two pressurising pipelines.Specially：Compressed air (source of the gas) is configured filtering
After the gas source pipe of pressure-reducing valve passes by filter pressure regulation, then it is divided into two-way after flow control valve：All the way with 3 position-5 way magnetic valve phase
Even, the motion for two cylinder piston rods of control：The source of the gas pipeline being connected with flow control valve is with being arranged on cylinder control pipe
The air inlet of 3 position-5 way magnetic valve on road is connected, and two gas outlets of 3 position-5 way magnetic valve pass through pipeline and two respectively
The rodless cavity insertion of cylinder, two exhaust outlets are penetrated by the rod chamber of pipeline and two cylinders respectively；By controlling three five
The working condition of three-way electromagnetic valve, so as to control two cylinders to perform seal operation to cylinder to be detected respectively.Another way and gas circuit
Threeway A air inlet is connected, and for carrying out pressurising to cylinder to be detected, is specially：Gas circuit threeway A has an air inlet, and two
Individual gas outlet, two gas outlets respectively correspond to two stations cylinder to be detected, by wherein all the way exemplified by：Gas circuit threeway A's goes out
Gas port penetrates by the air inlet of the pipeline and gas circuit threeway B that are provided with pressure-reducing valve and two three-way electromagnetic valves, two of gas circuit threeway B
One is connected with workpiece gas tube 16 in gas outlet, and another is connected with the electronic pressure gage for measuring the blowing pressure.Wherein
Flow control valve is used for controlling the movement velocity of cylinder, by setting pressure-reducing valve and flow control valve to improve the steady of gas circuit unit
It is qualitative.
Control unit controls above-mentioned various magnetic valves to realize automatic air seal test work(by PLC (programmable logic controller (PLC))
Energy.Double is controlled (i.e. one-key start) by a switch, but pressurize experiment and testing result are not interfere with each other, and are separately entered
OK；Specific works step is：
Step 1：When initial, 3 position-5 way magnetic valve and two two three-way electromagnetic valves are in off-position；Press startup
After switch, 3 position-5 way solenoid valves, if a currently only cylinder to be detected, is selected corresponding with the cylinder to be detected
The working position of cylinders is connected；If currently there is two cylinders to be detected, the working position of 3 position-5 way magnetic valve is turned on；Pressure
Contracting gas enters the rodless cavity of cylinder, and the piston rod of pusher cylinder is descending, is docked by gastight joint with the sealing of cylinder air admission hole.
Step 2：When the briquetting on piston rod touches travel switch, travel switch conducting, send and transport to control unit
Dynamic signal in place；After control unit receives the signal, the magnetic valve power-off of control 3 position-5 way, and control in gas circuit unit and correspond to work
Two three-way electromagnetic valves conducting in position, compressed gas is filled with into cylinder to be detected.
Step 3：In gas replenishment process, pressure gauge in real time suppress pressure and be sent to control unit by monitoring, when pressure value reaches
During the technique pressurize value of setting, control unit controls the disconnection of two three-way electromagnetic valves now to enter packing state, dwell time 1min.
Step 4：After the dwell time 1min is reached, control unit judges cylinder to be detected according to the pressure value of pressure gauge
It is whether airtight qualified, if the pressure value of pressure gauge detection is less than the lower limit set, illustrate that cylinder to be detected is airtight unqualified；
If the pressure value of pressure gauge detection illustrates that cylinder to be detected is airtight qualified not less than the lower limit of setting.
Step 5：After the completion of judgement, control unit controls 3 position-5 way solenoid valves again, and compressed gas is entered into gas
The rod chamber of cylinder, the piston rod of pusher cylinder are up to position to be assembled, wait next cylinder to be assembled.
Embodiment 2：
Based on the automatic air tightness detection system of multistation in embodiment 1, the present embodiment provides a kind of air-leakage test dress
Put.
As shown in Figures 2 and 3, the air-tightness detection device includes：Frame 1, airtight construction, gas circuit unit and control are single
Member.The present embodiment is double air-tightness detection device, i.e., there is provided two stations, can distinguish right two cylinders to be detected
(measurement equipment to be checked is cylinder in the present embodiment) carries out air-leakage test.Two station common frames 1 and control unit, Mei Gegong
There are independent airtight construction and gas circuit unit in position respectively.Wherein airtight construction includes cylinder 2 and gastight joint 12, and cylinder is as master
Moving part coordinates gastight joint to replace manually sealing cylinder to be detected；Frame 1 is the support of whole device, for installing
Cylinder 2 and cylinder to be detected；Gas circuit unit is used to gas being filled with cylinder to be detected；Control unit is used to realize fills automatically
Pressure, pressurize, detection and qualification determination.
Frame 1 includes support and main board, and support is door case type structure, including horizontal base, bottom and base it is affixed and
Column and the crossbeam that is fixed at the top of two columns positioned at base two opposite sides.It is solid on base to improve the reliability of column
It is connected to the reinforcement that skewed horizontal load is carried out for column.Panel 7, the various indicator lamps needed for device are connected with crossbeam
(the corresponding green indicating lamp 18 of each station and a red led 19), switch, pressure gauge 17 etc. are assemblied in panel 7
On.
Main board 8 is fixed between two columns of support, for supporting cylinder 2 and cylinder to be detected.On main board 8
There is provided two stations, two stations individually control, and to reduce interference, improve the flexibility that device uses.Each station
It is correspondingly arranged on cylinder 2, upper bracket 9, undersetting 10, pressure gauge 17 and indicator lamp.Cylinder 2 is arranged on master by cylinder block 11
On body plate 8, the end set of the piston rod of cylinder 2 has gastight joint 12, the workpiece gas tube 16 being connected with source of the gas and gastight joint
12 are connected, and because workpiece gas tube 16 can move with piston, therefore workpiece gas tube 16 selects flexible plastic tube, bendable
Song, the length of itinerary part is reserved during installation.It is provided for fixing cylinder to be detected below the upper cylinder piston rod of main board 8
The upper bracket 9 and undersetting 10 of body；During detection, cylinder to be detected is fixed between upper bracket 9 and undersetting 10.In main board 8
The top of upper upper bracket 9 is provided with travel switch 15, and when cylinder 2 works, its piston rod moves downward the gas for making piston rod end
Contiguity first 12 seals the air admission hole of cylinder to be detected, when the briquetting on cylinder piston rod touches travel switch 15, cylinder 2
Stopping moves down.
Except the power line and source of the gas pipeline that introduce in whole experimental rig, sealing protection is carried out by protective cover；Meanwhile
Protective cover is detachable, convenient maintenance.
Each valve in gas circuit unit is controlled by control unit, logical by above-mentioned 3 position-5 way magnetic valve and two two
Setting for magnetic valve can be controlled the cylinder of two stations and cylinder to be detected respectively.
In summary, presently preferred embodiments of the present invention is these are only, is not intended to limit the scope of the present invention.
Within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc., it should be included in the present invention's
Within protection domain.
Claims (6)
- A kind of 1. automatic air tightness detection system of multistation, it is characterised in that including：Airtight construction, gas circuit unit and control are single Member；Two or more station, the corresponding measurement equipment to be checked of each station are provided with the detecting system；The airtight construction corresponds with measurement equipment to be checked, including：Cylinder and the gas installed in the cylinder piston boom end Touch head, during the cylinder operation, make the gastight joint and the air admission hole of measurement equipment to be checked close by the motion of its piston rod Envelope docking；The gas circuit unit includes：Source of the gas pipeline, cylinder control piper and pressurising pipeline；Each corresponding cylinder control of station Pipeline and a pressurising pipeline；Source of the gas is divided into two-way after the source of the gas pipeline：Controlled all the way by the cylinder control piper The motion of corresponding cylinder piston rod；Gas is filled with corresponding to be detected set by another way by the pressurising pipeline It is standby；Described control unit includes being arranged on the cylinder control piper and magnetic valve on pressurising pipeline, to be detected for monitoring The pressure gauge and controller of equipment the blowing pressure；The magnetic valve and pressure gauge are controlled by the controller：When the magnetic valve on the cylinder control piper is in institute State after being powered under the control of controller, the cylinder piston rod motion makes the gastight joint and the air admission hole of measurement equipment to be checked close Envelope docking；After the magnetic valve on the source of the gas pipeline is powered under the control of the controller, pass through the gas source pipe Inflated in road direction measurement equipment to be checked；In gas replenishment process, the pressure gauge monitors the pressure value in measurement equipment to be checked in real time, works as pressure When value reaches the pressurize value of setting, stop inflation, into packing state；After the dwell time setting time is reached, the control Device judges the air-tightness of measurement equipment to be checked according to the pressure value of pressure gauge.
- 2. the automatic air tightness detection system of multistation as claimed in claim 1, it is characterised in that be provided with the detecting system Two stations, described control unit include be arranged on cylinder control piper 3 position-5 way magnetic valve, be arranged on two pressurisings Two three-way electromagnetic valves on pipeline；Source of the gas is divided into two-way after the source of the gas pipeline：It is connected all the way with the 3 position-5 way magnetic valve, for controlling the motion of two cylinder piston rods, is specially：The source of the gas Pipeline is connected with the air inlet of the 3 position-5 way magnetic valve, two gas outlets of the 3 position-5 way magnetic valve respectively with two The rodless cavity insertion of cylinder, two exhaust outlets penetrate with the rod chamber of two cylinders respectively；Another way is connected with gas circuit threeway A air inlet, for carrying out pressurising to cylinder to be detected, is specially：Gas circuit threeway A has There are an air inlet, two gas outlets；The source of the gas pipeline is connected with the air inlet of the gas circuit threeway A, and gas circuit threeway A's goes out Gas port penetrates by the air inlet of the pressurising pipeline and gas circuit threeway B that are provided with two three-way electromagnetic valves, gas circuit threeway B two outlets Mouthful in one by pipeline with and measurement equipment to be checked air admission hole seal dock gastight joint insertion, another with for measuring The pressure gauge of the blowing pressure is connected.
- 3. the automatic air tightness detection system of multistation as claimed in claim 1 or 2, it is characterised in that in the source of the gas pipeline On be provided with flow control valve, pass through the flow control valve control cylinder piston rod movement velocity.
- 4. the automatic air tightness detection system of multistation as claimed in claim 1 or 2, it is characterised in that in the source of the gas pipeline On be provided with filtering pressure reducing valve.
- 5. the automatic air tightness detection system of multistation as claimed in claim 1 or 2, it is characterised in that in the loading line On be provided with pressure-reducing valve.
- 6. the automatic air tightness detection system of multistation as claimed in claim 1 or 2, it is characterised in that in the cylinder piston Travel switch is provided with the direction of motion of bar；When cylinder piston rod touches the travel switch, the controller control Magnetic valve on the cylinder control piper powers off, cylinder piston rod stop motion, and now the airtight of cylinder piston boom end connects Head docks with the air admission hole sealing of measurement equipment to be checked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710606598.2A CN107340105A (en) | 2017-07-24 | 2017-07-24 | A kind of automatic air tightness detection system of multistation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710606598.2A CN107340105A (en) | 2017-07-24 | 2017-07-24 | A kind of automatic air tightness detection system of multistation |
Publications (1)
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| CN107340105A true CN107340105A (en) | 2017-11-10 |
Family
ID=60216053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201710606598.2A Pending CN107340105A (en) | 2017-07-24 | 2017-07-24 | A kind of automatic air tightness detection system of multistation |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107976290A (en) * | 2018-01-04 | 2018-05-01 | 重庆安木科技有限公司 | A kind of double-station sealing detection system |
| CN108444658A (en) * | 2018-06-26 | 2018-08-24 | 深圳市威富通讯技术有限公司 | Online air-tightness testing device and assembly line |
| CN108663173A (en) * | 2018-08-09 | 2018-10-16 | 安徽纽威吉新能源汽车技术有限公司 | A kind of vortex compressor of air conditioner intelligence leakage detection apparatus and detection method |
| CN109238592A (en) * | 2018-11-03 | 2019-01-18 | 北京京精医疗设备有限公司 | A kind of pump line pipeline device for detecting sealability |
| CN109253849A (en) * | 2018-11-26 | 2019-01-22 | 西安钧诚精密制造有限公司 | A kind of multi-functional air-tightness detection device |
| CN109855813A (en) * | 2019-01-10 | 2019-06-07 | 上海盛韬半导体科技有限公司 | Integrate the simple detection device and its operation method of pressure maintaining and helium leak check |
| CN109932144A (en) * | 2019-04-18 | 2019-06-25 | 苏州埃缇益自动化科技有限公司 | Work piece sealing system safety testing device |
| CN110763403A (en) * | 2019-11-20 | 2020-02-07 | 广汽乘用车有限公司 | System and method for rapidly detecting air tightness of automobile part |
| CN112098020A (en) * | 2020-09-18 | 2020-12-18 | 宁波益诺生智能制造有限公司 | Water collecting cup air leakage detection device |
| CN112161762A (en) * | 2020-09-09 | 2021-01-01 | 江苏南方机电股份有限公司 | Oil cylinder air tightness detection device |
| CN114459701A (en) * | 2021-12-27 | 2022-05-10 | 宜昌测试技术研究所 | Unmanned navigation ware leakproofness inspection device under water |
| CN116990446A (en) * | 2023-06-14 | 2023-11-03 | 常州泰翔自动化设备科技有限公司 | Multi-gas automatic calibration detection equipment and detection method for mining portable instrument |
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| CN105628308A (en) * | 2015-12-16 | 2016-06-01 | 上海宝舜医疗器械有限公司 | Airtightness detection device and detection method for multi-exhaust infusion apparatus |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107976290B (en) * | 2018-01-04 | 2024-04-19 | 重庆安木科技有限公司 | Double-station seal detection system |
| CN107976290A (en) * | 2018-01-04 | 2018-05-01 | 重庆安木科技有限公司 | A kind of double-station sealing detection system |
| CN108444658A (en) * | 2018-06-26 | 2018-08-24 | 深圳市威富通讯技术有限公司 | Online air-tightness testing device and assembly line |
| CN108663173A (en) * | 2018-08-09 | 2018-10-16 | 安徽纽威吉新能源汽车技术有限公司 | A kind of vortex compressor of air conditioner intelligence leakage detection apparatus and detection method |
| CN109238592A (en) * | 2018-11-03 | 2019-01-18 | 北京京精医疗设备有限公司 | A kind of pump line pipeline device for detecting sealability |
| CN109253849A (en) * | 2018-11-26 | 2019-01-22 | 西安钧诚精密制造有限公司 | A kind of multi-functional air-tightness detection device |
| CN109855813A (en) * | 2019-01-10 | 2019-06-07 | 上海盛韬半导体科技有限公司 | Integrate the simple detection device and its operation method of pressure maintaining and helium leak check |
| CN109855813B (en) * | 2019-01-10 | 2024-04-19 | 上海盛韬半导体科技有限公司 | Simple detection device integrating pressure maintaining and helium leakage detection and operation method thereof |
| CN109932144A (en) * | 2019-04-18 | 2019-06-25 | 苏州埃缇益自动化科技有限公司 | Work piece sealing system safety testing device |
| CN110763403A (en) * | 2019-11-20 | 2020-02-07 | 广汽乘用车有限公司 | System and method for rapidly detecting air tightness of automobile part |
| CN112161762A (en) * | 2020-09-09 | 2021-01-01 | 江苏南方机电股份有限公司 | Oil cylinder air tightness detection device |
| CN112098020A (en) * | 2020-09-18 | 2020-12-18 | 宁波益诺生智能制造有限公司 | Water collecting cup air leakage detection device |
| CN114459701A (en) * | 2021-12-27 | 2022-05-10 | 宜昌测试技术研究所 | Unmanned navigation ware leakproofness inspection device under water |
| CN116990446A (en) * | 2023-06-14 | 2023-11-03 | 常州泰翔自动化设备科技有限公司 | Multi-gas automatic calibration detection equipment and detection method for mining portable instrument |
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Application publication date: 20171110 |